package com.itzh.netty.codec;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    @Override //当通道就绪就会触发该方法
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
//        System.out.println("client = "+ctx);
//        ctx.writeAndFlush(Unpooled.copiedBuffer("hello,server喵", CharsetUtil.UTF_8));
         //发送student对象到服务器
        StudentPOJO.Student student = StudentPOJO.Student.newBuilder().setId(4).setName("嗨皮")
                .build();
        ctx.writeAndFlush(student);
    }

    @Override//当通道有读取事件时，会触发
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf) msg;
        System.out.println("服务器回复的消息："+buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器的地址："+ctx.channel().remoteAddress());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}
